<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>ref</title>
    <script src="./lib/vue-2.4.0.js"></script>
</head>
<body>
    <div id="app">
        <input type="button" value="获取元素" @click='getElement' ref='mybtn'>
        <h3 id="myh3" ref="myh3">哈哈，今天天气太好了</h3>
        <hr>
        <login ref="mylogin"></login>
    </div>
 
    <script>

        var login ={
            template:'<h1>登录组件</h1>',
            data(){
                return{
                    msg:'son msg'
                }
            },
            methods:{
                show(){
                    console.log('调用来了子组件的方法')
                }
            }
        }
    //创建 Vue 实例，得到 ViewModel
    var vm= new Vue({
        el:'#app',
        data:{},
        methods:{
            getElement(){
                // console.log(document.getElementById('myh3').innerText)

                //ref 是英文单词 【reference】引用  
                this.$refs.mylogin.show()
            }
        },
        components:{
            login
        }

    })
    </script>
</body>
</html>

